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OpenCloudOS-Kernel/drivers/infiniband/hw/mlx4/mad.c

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/*
* Copyright (c) 2007 Cisco Systems, Inc. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <rdma/ib_mad.h>
#include <rdma/ib_smi.h>
#include <rdma/ib_sa.h>
#include <rdma/ib_cache.h>
#include <linux/random.h>
#include <linux/mlx4/cmd.h>
#include <linux/gfp.h>
#include <rdma/ib_pma.h>
#include <linux/ip.h>
#include <net/ipv6.h>
#include <linux/mlx4/driver.h>
#include "mlx4_ib.h"
enum {
MLX4_IB_VENDOR_CLASS1 = 0x9,
MLX4_IB_VENDOR_CLASS2 = 0xa
};
#define MLX4_TUN_SEND_WRID_SHIFT 34
#define MLX4_TUN_QPN_SHIFT 32
#define MLX4_TUN_WRID_RECV (((u64) 1) << MLX4_TUN_SEND_WRID_SHIFT)
#define MLX4_TUN_SET_WRID_QPN(a) (((u64) ((a) & 0x3)) << MLX4_TUN_QPN_SHIFT)
#define MLX4_TUN_IS_RECV(a) (((a) >> MLX4_TUN_SEND_WRID_SHIFT) & 0x1)
#define MLX4_TUN_WRID_QPN(a) (((a) >> MLX4_TUN_QPN_SHIFT) & 0x3)
/* Port mgmt change event handling */
#define GET_BLK_PTR_FROM_EQE(eqe) be32_to_cpu(eqe->event.port_mgmt_change.params.tbl_change_info.block_ptr)
#define GET_MASK_FROM_EQE(eqe) be32_to_cpu(eqe->event.port_mgmt_change.params.tbl_change_info.tbl_entries_mask)
#define NUM_IDX_IN_PKEY_TBL_BLK 32
#define GUID_TBL_ENTRY_SIZE 8 /* size in bytes */
#define GUID_TBL_BLK_NUM_ENTRIES 8
#define GUID_TBL_BLK_SIZE (GUID_TBL_ENTRY_SIZE * GUID_TBL_BLK_NUM_ENTRIES)
struct mlx4_mad_rcv_buf {
struct ib_grh grh;
u8 payload[256];
} __packed;
struct mlx4_mad_snd_buf {
u8 payload[256];
} __packed;
struct mlx4_tunnel_mad {
struct ib_grh grh;
struct mlx4_ib_tunnel_header hdr;
struct ib_mad mad;
} __packed;
struct mlx4_rcv_tunnel_mad {
struct mlx4_rcv_tunnel_hdr hdr;
struct ib_grh grh;
struct ib_mad mad;
} __packed;
static void handle_client_rereg_event(struct mlx4_ib_dev *dev, u8 port_num);
static void handle_lid_change_event(struct mlx4_ib_dev *dev, u8 port_num);
static void __propagate_pkey_ev(struct mlx4_ib_dev *dev, int port_num,
int block, u32 change_bitmap);
__be64 mlx4_ib_gen_node_guid(void)
{
#define NODE_GUID_HI ((u64) (((u64)IB_OPENIB_OUI) << 40))
return cpu_to_be64(NODE_GUID_HI | prandom_u32());
}
__be64 mlx4_ib_get_new_demux_tid(struct mlx4_ib_demux_ctx *ctx)
{
return cpu_to_be64(atomic_inc_return(&ctx->tid)) |
cpu_to_be64(0xff00000000000000LL);
}
int mlx4_MAD_IFC(struct mlx4_ib_dev *dev, int mad_ifc_flags,
int port, const struct ib_wc *in_wc,
const struct ib_grh *in_grh,
const void *in_mad, void *response_mad)
{
struct mlx4_cmd_mailbox *inmailbox, *outmailbox;
void *inbox;
int err;
u32 in_modifier = port;
u8 op_modifier = 0;
inmailbox = mlx4_alloc_cmd_mailbox(dev->dev);
if (IS_ERR(inmailbox))
return PTR_ERR(inmailbox);
inbox = inmailbox->buf;
outmailbox = mlx4_alloc_cmd_mailbox(dev->dev);
if (IS_ERR(outmailbox)) {
mlx4_free_cmd_mailbox(dev->dev, inmailbox);
return PTR_ERR(outmailbox);
}
memcpy(inbox, in_mad, 256);
/*
* Key check traps can't be generated unless we have in_wc to
* tell us where to send the trap.
*/
if ((mad_ifc_flags & MLX4_MAD_IFC_IGNORE_MKEY) || !in_wc)
op_modifier |= 0x1;
if ((mad_ifc_flags & MLX4_MAD_IFC_IGNORE_BKEY) || !in_wc)
op_modifier |= 0x2;
if (mlx4_is_mfunc(dev->dev) &&
(mad_ifc_flags & MLX4_MAD_IFC_NET_VIEW || in_wc))
op_modifier |= 0x8;
if (in_wc) {
struct {
__be32 my_qpn;
u32 reserved1;
__be32 rqpn;
u8 sl;
u8 g_path;
u16 reserved2[2];
__be16 pkey;
u32 reserved3[11];
u8 grh[40];
} *ext_info;
memset(inbox + 256, 0, 256);
ext_info = inbox + 256;
ext_info->my_qpn = cpu_to_be32(in_wc->qp->qp_num);
ext_info->rqpn = cpu_to_be32(in_wc->src_qp);
ext_info->sl = in_wc->sl << 4;
ext_info->g_path = in_wc->dlid_path_bits |
(in_wc->wc_flags & IB_WC_GRH ? 0x80 : 0);
ext_info->pkey = cpu_to_be16(in_wc->pkey_index);
if (in_grh)
memcpy(ext_info->grh, in_grh, 40);
op_modifier |= 0x4;
in_modifier |= ib_lid_cpu16(in_wc->slid) << 16;
}
err = mlx4_cmd_box(dev->dev, inmailbox->dma, outmailbox->dma, in_modifier,
mlx4_is_master(dev->dev) ? (op_modifier & ~0x8) : op_modifier,
MLX4_CMD_MAD_IFC, MLX4_CMD_TIME_CLASS_C,
(op_modifier & 0x8) ? MLX4_CMD_NATIVE : MLX4_CMD_WRAPPED);
if (!err)
memcpy(response_mad, outmailbox->buf, 256);
mlx4_free_cmd_mailbox(dev->dev, inmailbox);
mlx4_free_cmd_mailbox(dev->dev, outmailbox);
return err;
}
static void update_sm_ah(struct mlx4_ib_dev *dev, u8 port_num, u16 lid, u8 sl)
{
struct ib_ah *new_ah;
struct rdma_ah_attr ah_attr;
unsigned long flags;
if (!dev->send_agent[port_num - 1][0])
return;
memset(&ah_attr, 0, sizeof ah_attr);
ah_attr.type = rdma_ah_find_type(&dev->ib_dev, port_num);
rdma_ah_set_dlid(&ah_attr, lid);
rdma_ah_set_sl(&ah_attr, sl);
rdma_ah_set_port_num(&ah_attr, port_num);
new_ah = rdma_create_ah(dev->send_agent[port_num - 1][0]->qp->pd,
&ah_attr, 0);
if (IS_ERR(new_ah))
return;
spin_lock_irqsave(&dev->sm_lock, flags);
if (dev->sm_ah[port_num - 1])
rdma_destroy_ah(dev->sm_ah[port_num - 1], 0);
dev->sm_ah[port_num - 1] = new_ah;
spin_unlock_irqrestore(&dev->sm_lock, flags);
}
/*
* Snoop SM MADs for port info, GUID info, and P_Key table sets, so we can
* synthesize LID change, Client-Rereg, GID change, and P_Key change events.
*/
static void smp_snoop(struct ib_device *ibdev, u8 port_num, const struct ib_mad *mad,
u16 prev_lid)
{
struct ib_port_info *pinfo;
u16 lid;
__be16 *base;
u32 bn, pkey_change_bitmap;
int i;
struct mlx4_ib_dev *dev = to_mdev(ibdev);
if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
mad->mad_hdr.method == IB_MGMT_METHOD_SET)
switch (mad->mad_hdr.attr_id) {
case IB_SMP_ATTR_PORT_INFO:
if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_PORT_MNG_CHG_EV)
return;
pinfo = (struct ib_port_info *) ((struct ib_smp *) mad)->data;
lid = be16_to_cpu(pinfo->lid);
update_sm_ah(dev, port_num,
be16_to_cpu(pinfo->sm_lid),
pinfo->neighbormtu_mastersmsl & 0xf);
if (pinfo->clientrereg_resv_subnetto & 0x80)
handle_client_rereg_event(dev, port_num);
if (prev_lid != lid)
handle_lid_change_event(dev, port_num);
break;
case IB_SMP_ATTR_PKEY_TABLE:
if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_PORT_MNG_CHG_EV)
return;
if (!mlx4_is_mfunc(dev->dev)) {
mlx4_ib_dispatch_event(dev, port_num,
IB_EVENT_PKEY_CHANGE);
break;
}
/* at this point, we are running in the master.
* Slaves do not receive SMPs.
*/
bn = be32_to_cpu(((struct ib_smp *)mad)->attr_mod) & 0xFFFF;
base = (__be16 *) &(((struct ib_smp *)mad)->data[0]);
pkey_change_bitmap = 0;
for (i = 0; i < 32; i++) {
pr_debug("PKEY[%d] = x%x\n",
i + bn*32, be16_to_cpu(base[i]));
if (be16_to_cpu(base[i]) !=
dev->pkeys.phys_pkey_cache[port_num - 1][i + bn*32]) {
pkey_change_bitmap |= (1 << i);
dev->pkeys.phys_pkey_cache[port_num - 1][i + bn*32] =
be16_to_cpu(base[i]);
}
}
pr_debug("PKEY Change event: port=%d, "
"block=0x%x, change_bitmap=0x%x\n",
port_num, bn, pkey_change_bitmap);
if (pkey_change_bitmap) {
mlx4_ib_dispatch_event(dev, port_num,
IB_EVENT_PKEY_CHANGE);
if (!dev->sriov.is_going_down)
__propagate_pkey_ev(dev, port_num, bn,
pkey_change_bitmap);
}
break;
case IB_SMP_ATTR_GUID_INFO:
if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_PORT_MNG_CHG_EV)
return;
/* paravirtualized master's guid is guid 0 -- does not change */
if (!mlx4_is_master(dev->dev))
mlx4_ib_dispatch_event(dev, port_num,
IB_EVENT_GID_CHANGE);
/*if master, notify relevant slaves*/
if (mlx4_is_master(dev->dev) &&
!dev->sriov.is_going_down) {
bn = be32_to_cpu(((struct ib_smp *)mad)->attr_mod);
mlx4_ib_update_cache_on_guid_change(dev, bn, port_num,
(u8 *)(&((struct ib_smp *)mad)->data));
mlx4_ib_notify_slaves_on_guid_change(dev, bn, port_num,
(u8 *)(&((struct ib_smp *)mad)->data));
}
break;
case IB_SMP_ATTR_SL_TO_VL_TABLE:
/* cache sl to vl mapping changes for use in
* filling QP1 LRH VL field when sending packets
*/
if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_PORT_MNG_CHG_EV &&
dev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_SL_TO_VL_CHANGE_EVENT)
return;
if (!mlx4_is_slave(dev->dev)) {
union sl2vl_tbl_to_u64 sl2vl64;
int jj;
for (jj = 0; jj < 8; jj++) {
sl2vl64.sl8[jj] = ((struct ib_smp *)mad)->data[jj];
pr_debug("port %u, sl2vl[%d] = %02x\n",
port_num, jj, sl2vl64.sl8[jj]);
}
atomic64_set(&dev->sl2vl[port_num - 1], sl2vl64.sl64);
}
break;
default:
break;
}
}
static void __propagate_pkey_ev(struct mlx4_ib_dev *dev, int port_num,
int block, u32 change_bitmap)
{
int i, ix, slave, err;
int have_event = 0;
for (slave = 0; slave < dev->dev->caps.sqp_demux; slave++) {
if (slave == mlx4_master_func_num(dev->dev))
continue;
if (!mlx4_is_slave_active(dev->dev, slave))
continue;
have_event = 0;
for (i = 0; i < 32; i++) {
if (!(change_bitmap & (1 << i)))
continue;
for (ix = 0;
ix < dev->dev->caps.pkey_table_len[port_num]; ix++) {
if (dev->pkeys.virt2phys_pkey[slave][port_num - 1]
[ix] == i + 32 * block) {
err = mlx4_gen_pkey_eqe(dev->dev, slave, port_num);
pr_debug("propagate_pkey_ev: slave %d,"
" port %d, ix %d (%d)\n",
slave, port_num, ix, err);
have_event = 1;
break;
}
}
if (have_event)
break;
}
}
}
static void node_desc_override(struct ib_device *dev,
struct ib_mad *mad)
{
unsigned long flags;
if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
mad->mad_hdr.method == IB_MGMT_METHOD_GET_RESP &&
mad->mad_hdr.attr_id == IB_SMP_ATTR_NODE_DESC) {
spin_lock_irqsave(&to_mdev(dev)->sm_lock, flags);
memcpy(((struct ib_smp *) mad)->data, dev->node_desc,
IB_DEVICE_NODE_DESC_MAX);
spin_unlock_irqrestore(&to_mdev(dev)->sm_lock, flags);
}
}
static void forward_trap(struct mlx4_ib_dev *dev, u8 port_num, const struct ib_mad *mad)
{
int qpn = mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_SUBN_LID_ROUTED;
struct ib_mad_send_buf *send_buf;
struct ib_mad_agent *agent = dev->send_agent[port_num - 1][qpn];
int ret;
unsigned long flags;
if (agent) {
send_buf = ib_create_send_mad(agent, qpn, 0, 0, IB_MGMT_MAD_HDR,
IB_MGMT_MAD_DATA, GFP_ATOMIC,
IB_MGMT_BASE_VERSION);
if (IS_ERR(send_buf))
return;
/*
* We rely here on the fact that MLX QPs don't use the
* address handle after the send is posted (this is
* wrong following the IB spec strictly, but we know
* it's OK for our devices).
*/
spin_lock_irqsave(&dev->sm_lock, flags);
memcpy(send_buf->mad, mad, sizeof *mad);
if ((send_buf->ah = dev->sm_ah[port_num - 1]))
ret = ib_post_send_mad(send_buf, NULL);
else
ret = -EINVAL;
spin_unlock_irqrestore(&dev->sm_lock, flags);
if (ret)
ib_free_send_mad(send_buf);
}
}
static int mlx4_ib_demux_sa_handler(struct ib_device *ibdev, int port, int slave,
struct ib_sa_mad *sa_mad)
{
int ret = 0;
/* dispatch to different sa handlers */
switch (be16_to_cpu(sa_mad->mad_hdr.attr_id)) {
case IB_SA_ATTR_MC_MEMBER_REC:
ret = mlx4_ib_mcg_demux_handler(ibdev, port, slave, sa_mad);
break;
default:
break;
}
return ret;
}
int mlx4_ib_find_real_gid(struct ib_device *ibdev, u8 port, __be64 guid)
{
struct mlx4_ib_dev *dev = to_mdev(ibdev);
int i;
for (i = 0; i < dev->dev->caps.sqp_demux; i++) {
if (dev->sriov.demux[port - 1].guid_cache[i] == guid)
return i;
}
return -1;
}
static int find_slave_port_pkey_ix(struct mlx4_ib_dev *dev, int slave,
u8 port, u16 pkey, u16 *ix)
{
int i, ret;
u8 unassigned_pkey_ix, pkey_ix, partial_ix = 0xFF;
u16 slot_pkey;
if (slave == mlx4_master_func_num(dev->dev))
return ib_find_cached_pkey(&dev->ib_dev, port, pkey, ix);
unassigned_pkey_ix = dev->dev->phys_caps.pkey_phys_table_len[port] - 1;
for (i = 0; i < dev->dev->caps.pkey_table_len[port]; i++) {
if (dev->pkeys.virt2phys_pkey[slave][port - 1][i] == unassigned_pkey_ix)
continue;
pkey_ix = dev->pkeys.virt2phys_pkey[slave][port - 1][i];
ret = ib_get_cached_pkey(&dev->ib_dev, port, pkey_ix, &slot_pkey);
if (ret)
continue;
if ((slot_pkey & 0x7FFF) == (pkey & 0x7FFF)) {
if (slot_pkey & 0x8000) {
*ix = (u16) pkey_ix;
return 0;
} else {
/* take first partial pkey index found */
if (partial_ix == 0xFF)
partial_ix = pkey_ix;
}
}
}
if (partial_ix < 0xFF) {
*ix = (u16) partial_ix;
return 0;
}
return -EINVAL;
}
static int get_gids_from_l3_hdr(struct ib_grh *grh, union ib_gid *sgid,
union ib_gid *dgid)
{
int version = ib_get_rdma_header_version((const union rdma_network_hdr *)grh);
enum rdma_network_type net_type;
if (version == 4)
net_type = RDMA_NETWORK_IPV4;
else if (version == 6)
net_type = RDMA_NETWORK_IPV6;
else
return -EINVAL;
return ib_get_gids_from_rdma_hdr((union rdma_network_hdr *)grh, net_type,
sgid, dgid);
}
int mlx4_ib_send_to_slave(struct mlx4_ib_dev *dev, int slave, u8 port,
enum ib_qp_type dest_qpt, struct ib_wc *wc,
struct ib_grh *grh, struct ib_mad *mad)
{
struct ib_sge list;
struct ib_ud_wr wr;
const struct ib_send_wr *bad_wr;
struct mlx4_ib_demux_pv_ctx *tun_ctx;
struct mlx4_ib_demux_pv_qp *tun_qp;
struct mlx4_rcv_tunnel_mad *tun_mad;
struct rdma_ah_attr attr;
struct ib_ah *ah;
struct ib_qp *src_qp = NULL;
unsigned tun_tx_ix = 0;
int dqpn;
int ret = 0;
u16 tun_pkey_ix;
u16 cached_pkey;
u8 is_eth = dev->dev->caps.port_type[port] == MLX4_PORT_TYPE_ETH;
if (dest_qpt > IB_QPT_GSI)
return -EINVAL;
tun_ctx = dev->sriov.demux[port-1].tun[slave];
/* check if proxy qp created */
if (!tun_ctx || tun_ctx->state != DEMUX_PV_STATE_ACTIVE)
return -EAGAIN;
if (!dest_qpt)
tun_qp = &tun_ctx->qp[0];
else
tun_qp = &tun_ctx->qp[1];
/* compute P_Key index to put in tunnel header for slave */
if (dest_qpt) {
u16 pkey_ix;
ret = ib_get_cached_pkey(&dev->ib_dev, port, wc->pkey_index, &cached_pkey);
if (ret)
return -EINVAL;
ret = find_slave_port_pkey_ix(dev, slave, port, cached_pkey, &pkey_ix);
if (ret)
return -EINVAL;
tun_pkey_ix = pkey_ix;
} else
tun_pkey_ix = dev->pkeys.virt2phys_pkey[slave][port - 1][0];
dqpn = dev->dev->phys_caps.base_proxy_sqpn + 8 * slave + port + (dest_qpt * 2) - 1;
/* get tunnel tx data buf for slave */
src_qp = tun_qp->qp;
/* create ah. Just need an empty one with the port num for the post send.
* The driver will set the force loopback bit in post_send */
memset(&attr, 0, sizeof attr);
attr.type = rdma_ah_find_type(&dev->ib_dev, port);
rdma_ah_set_port_num(&attr, port);
if (is_eth) {
union ib_gid sgid;
union ib_gid dgid;
if (get_gids_from_l3_hdr(grh, &sgid, &dgid))
return -EINVAL;
rdma_ah_set_grh(&attr, &dgid, 0, 0, 0, 0);
}
ah = rdma_create_ah(tun_ctx->pd, &attr, 0);
if (IS_ERR(ah))
return -ENOMEM;
/* allocate tunnel tx buf after pass failure returns */
spin_lock(&tun_qp->tx_lock);
if (tun_qp->tx_ix_head - tun_qp->tx_ix_tail >=
(MLX4_NUM_TUNNEL_BUFS - 1))
ret = -EAGAIN;
else
tun_tx_ix = (++tun_qp->tx_ix_head) & (MLX4_NUM_TUNNEL_BUFS - 1);
spin_unlock(&tun_qp->tx_lock);
if (ret)
goto end;
tun_mad = (struct mlx4_rcv_tunnel_mad *) (tun_qp->tx_ring[tun_tx_ix].buf.addr);
if (tun_qp->tx_ring[tun_tx_ix].ah)
rdma_destroy_ah(tun_qp->tx_ring[tun_tx_ix].ah, 0);
tun_qp->tx_ring[tun_tx_ix].ah = ah;
ib_dma_sync_single_for_cpu(&dev->ib_dev,
tun_qp->tx_ring[tun_tx_ix].buf.map,
sizeof (struct mlx4_rcv_tunnel_mad),
DMA_TO_DEVICE);
/* copy over to tunnel buffer */
if (grh)
memcpy(&tun_mad->grh, grh, sizeof *grh);
memcpy(&tun_mad->mad, mad, sizeof *mad);
/* adjust tunnel data */
tun_mad->hdr.pkey_index = cpu_to_be16(tun_pkey_ix);
tun_mad->hdr.flags_src_qp = cpu_to_be32(wc->src_qp & 0xFFFFFF);
tun_mad->hdr.g_ml_path = (grh && (wc->wc_flags & IB_WC_GRH)) ? 0x80 : 0;
if (is_eth) {
u16 vlan = 0;
if (mlx4_get_slave_default_vlan(dev->dev, port, slave, &vlan,
NULL)) {
/* VST mode */
if (vlan != wc->vlan_id)
/* Packet vlan is not the VST-assigned vlan.
* Drop the packet.
*/
goto out;
else
/* Remove the vlan tag before forwarding
* the packet to the VF.
*/
vlan = 0xffff;
} else {
vlan = wc->vlan_id;
}
tun_mad->hdr.sl_vid = cpu_to_be16(vlan);
memcpy((char *)&tun_mad->hdr.mac_31_0, &(wc->smac[0]), 4);
memcpy((char *)&tun_mad->hdr.slid_mac_47_32, &(wc->smac[4]), 2);
} else {
tun_mad->hdr.sl_vid = cpu_to_be16(((u16)(wc->sl)) << 12);
tun_mad->hdr.slid_mac_47_32 = ib_lid_be16(wc->slid);
}
ib_dma_sync_single_for_device(&dev->ib_dev,
tun_qp->tx_ring[tun_tx_ix].buf.map,
sizeof (struct mlx4_rcv_tunnel_mad),
DMA_TO_DEVICE);
list.addr = tun_qp->tx_ring[tun_tx_ix].buf.map;
list.length = sizeof (struct mlx4_rcv_tunnel_mad);
list.lkey = tun_ctx->pd->local_dma_lkey;
wr.ah = ah;
wr.port_num = port;
wr.remote_qkey = IB_QP_SET_QKEY;
wr.remote_qpn = dqpn;
wr.wr.next = NULL;
wr.wr.wr_id = ((u64) tun_tx_ix) | MLX4_TUN_SET_WRID_QPN(dest_qpt);
wr.wr.sg_list = &list;
wr.wr.num_sge = 1;
wr.wr.opcode = IB_WR_SEND;
wr.wr.send_flags = IB_SEND_SIGNALED;
ret = ib_post_send(src_qp, &wr.wr, &bad_wr);
if (!ret)
return 0;
out:
spin_lock(&tun_qp->tx_lock);
tun_qp->tx_ix_tail++;
spin_unlock(&tun_qp->tx_lock);
tun_qp->tx_ring[tun_tx_ix].ah = NULL;
end:
rdma_destroy_ah(ah, 0);
return ret;
}
static int mlx4_ib_demux_mad(struct ib_device *ibdev, u8 port,
struct ib_wc *wc, struct ib_grh *grh,
struct ib_mad *mad)
{
struct mlx4_ib_dev *dev = to_mdev(ibdev);
int err, other_port;
int slave = -1;
u8 *slave_id;
int is_eth = 0;
if (rdma_port_get_link_layer(ibdev, port) == IB_LINK_LAYER_INFINIBAND)
is_eth = 0;
else
is_eth = 1;
if (is_eth) {
union ib_gid dgid;
union ib_gid sgid;
if (get_gids_from_l3_hdr(grh, &sgid, &dgid))
return -EINVAL;
if (!(wc->wc_flags & IB_WC_GRH)) {
mlx4_ib_warn(ibdev, "RoCE grh not present.\n");
return -EINVAL;
}
if (mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_CM) {
mlx4_ib_warn(ibdev, "RoCE mgmt class is not CM\n");
return -EINVAL;
}
err = mlx4_get_slave_from_roce_gid(dev->dev, port, dgid.raw, &slave);
if (err && mlx4_is_mf_bonded(dev->dev)) {
other_port = (port == 1) ? 2 : 1;
err = mlx4_get_slave_from_roce_gid(dev->dev, other_port, dgid.raw, &slave);
if (!err) {
port = other_port;
pr_debug("resolved slave %d from gid %pI6 wire port %d other %d\n",
slave, grh->dgid.raw, port, other_port);
}
}
if (err) {
mlx4_ib_warn(ibdev, "failed matching grh\n");
return -ENOENT;
}
if (slave >= dev->dev->caps.sqp_demux) {
mlx4_ib_warn(ibdev, "slave id: %d is bigger than allowed:%d\n",
slave, dev->dev->caps.sqp_demux);
return -ENOENT;
}
if (mlx4_ib_demux_cm_handler(ibdev, port, NULL, mad))
return 0;
err = mlx4_ib_send_to_slave(dev, slave, port, wc->qp->qp_type, wc, grh, mad);
if (err)
pr_debug("failed sending to slave %d via tunnel qp (%d)\n",
slave, err);
return 0;
}
/* Initially assume that this mad is for us */
slave = mlx4_master_func_num(dev->dev);
/* See if the slave id is encoded in a response mad */
if (mad->mad_hdr.method & 0x80) {
slave_id = (u8 *) &mad->mad_hdr.tid;
slave = *slave_id;
if (slave != 255) /*255 indicates the dom0*/
*slave_id = 0; /* remap tid */
}
/* If a grh is present, we demux according to it */
if (wc->wc_flags & IB_WC_GRH) {
if (grh->dgid.global.interface_id ==
cpu_to_be64(IB_SA_WELL_KNOWN_GUID) &&
grh->dgid.global.subnet_prefix == cpu_to_be64(
atomic64_read(&dev->sriov.demux[port - 1].subnet_prefix))) {
slave = 0;
} else {
slave = mlx4_ib_find_real_gid(ibdev, port,
grh->dgid.global.interface_id);
if (slave < 0) {
mlx4_ib_warn(ibdev, "failed matching grh\n");
return -ENOENT;
}
}
}
/* Class-specific handling */
switch (mad->mad_hdr.mgmt_class) {
case IB_MGMT_CLASS_SUBN_LID_ROUTED:
case IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE:
/* 255 indicates the dom0 */
if (slave != 255 && slave != mlx4_master_func_num(dev->dev)) {
if (!mlx4_vf_smi_enabled(dev->dev, slave, port))
return -EPERM;
/* for a VF. drop unsolicited MADs */
if (!(mad->mad_hdr.method & IB_MGMT_METHOD_RESP)) {
mlx4_ib_warn(ibdev, "demux QP0. rejecting unsolicited mad for slave %d class 0x%x, method 0x%x\n",
slave, mad->mad_hdr.mgmt_class,
mad->mad_hdr.method);
return -EINVAL;
}
}
break;
case IB_MGMT_CLASS_SUBN_ADM:
if (mlx4_ib_demux_sa_handler(ibdev, port, slave,
(struct ib_sa_mad *) mad))
return 0;
break;
case IB_MGMT_CLASS_CM:
if (mlx4_ib_demux_cm_handler(ibdev, port, &slave, mad))
return 0;
break;
case IB_MGMT_CLASS_DEVICE_MGMT:
if (mad->mad_hdr.method != IB_MGMT_METHOD_GET_RESP)
return 0;
break;
default:
/* Drop unsupported classes for slaves in tunnel mode */
if (slave != mlx4_master_func_num(dev->dev)) {
pr_debug("dropping unsupported ingress mad from class:%d "
"for slave:%d\n", mad->mad_hdr.mgmt_class, slave);
return 0;
}
}
/*make sure that no slave==255 was not handled yet.*/
if (slave >= dev->dev->caps.sqp_demux) {
mlx4_ib_warn(ibdev, "slave id: %d is bigger than allowed:%d\n",
slave, dev->dev->caps.sqp_demux);
return -ENOENT;
}
err = mlx4_ib_send_to_slave(dev, slave, port, wc->qp->qp_type, wc, grh, mad);
if (err)
pr_debug("failed sending to slave %d via tunnel qp (%d)\n",
slave, err);
return 0;
}
static int ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
const struct ib_wc *in_wc, const struct ib_grh *in_grh,
const struct ib_mad *in_mad, struct ib_mad *out_mad)
{
u16 slid, prev_lid = 0;
int err;
struct ib_port_attr pattr;
if (in_wc && in_wc->qp) {
pr_debug("received MAD: port:%d slid:%d sqpn:%d "
"dlid_bits:%d dqpn:%d wc_flags:0x%x tid:%016llx cls:%x mtd:%x atr:%x\n",
port_num,
in_wc->slid, in_wc->src_qp,
in_wc->dlid_path_bits,
in_wc->qp->qp_num,
in_wc->wc_flags,
be64_to_cpu(in_mad->mad_hdr.tid),
in_mad->mad_hdr.mgmt_class, in_mad->mad_hdr.method,
be16_to_cpu(in_mad->mad_hdr.attr_id));
if (in_wc->wc_flags & IB_WC_GRH) {
pr_debug("sgid_hi:0x%016llx sgid_lo:0x%016llx\n",
be64_to_cpu(in_grh->sgid.global.subnet_prefix),
be64_to_cpu(in_grh->sgid.global.interface_id));
pr_debug("dgid_hi:0x%016llx dgid_lo:0x%016llx\n",
be64_to_cpu(in_grh->dgid.global.subnet_prefix),
be64_to_cpu(in_grh->dgid.global.interface_id));
}
}
slid = in_wc ? ib_lid_cpu16(in_wc->slid) : be16_to_cpu(IB_LID_PERMISSIVE);
if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP && slid == 0) {
forward_trap(to_mdev(ibdev), port_num, in_mad);
return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
}
if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET &&
in_mad->mad_hdr.method != IB_MGMT_METHOD_SET &&
in_mad->mad_hdr.method != IB_MGMT_METHOD_TRAP_REPRESS)
return IB_MAD_RESULT_SUCCESS;
/*
* Don't process SMInfo queries -- the SMA can't handle them.
*/
if (in_mad->mad_hdr.attr_id == IB_SMP_ATTR_SM_INFO)
return IB_MAD_RESULT_SUCCESS;
} else if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT ||
in_mad->mad_hdr.mgmt_class == MLX4_IB_VENDOR_CLASS1 ||
in_mad->mad_hdr.mgmt_class == MLX4_IB_VENDOR_CLASS2 ||
in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_CONG_MGMT) {
if (in_mad->mad_hdr.method != IB_MGMT_METHOD_GET &&
in_mad->mad_hdr.method != IB_MGMT_METHOD_SET)
return IB_MAD_RESULT_SUCCESS;
} else
return IB_MAD_RESULT_SUCCESS;
if ((in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
in_mad->mad_hdr.method == IB_MGMT_METHOD_SET &&
in_mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO &&
!ib_query_port(ibdev, port_num, &pattr))
prev_lid = ib_lid_cpu16(pattr.lid);
err = mlx4_MAD_IFC(to_mdev(ibdev),
(mad_flags & IB_MAD_IGNORE_MKEY ? MLX4_MAD_IFC_IGNORE_MKEY : 0) |
(mad_flags & IB_MAD_IGNORE_BKEY ? MLX4_MAD_IFC_IGNORE_BKEY : 0) |
MLX4_MAD_IFC_NET_VIEW,
port_num, in_wc, in_grh, in_mad, out_mad);
if (err)
return IB_MAD_RESULT_FAILURE;
if (!out_mad->mad_hdr.status) {
smp_snoop(ibdev, port_num, in_mad, prev_lid);
/* slaves get node desc from FW */
if (!mlx4_is_slave(to_mdev(ibdev)->dev))
node_desc_override(ibdev, out_mad);
}
/* set return bit in status of directed route responses */
if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
out_mad->mad_hdr.status |= cpu_to_be16(1 << 15);
if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS)
/* no response for trap repress */
return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
}
static void edit_counter(struct mlx4_counter *cnt, void *counters,
__be16 attr_id)
{
switch (attr_id) {
case IB_PMA_PORT_COUNTERS:
{
struct ib_pma_portcounters *pma_cnt =
(struct ib_pma_portcounters *)counters;
ASSIGN_32BIT_COUNTER(pma_cnt->port_xmit_data,
(be64_to_cpu(cnt->tx_bytes) >> 2));
ASSIGN_32BIT_COUNTER(pma_cnt->port_rcv_data,
(be64_to_cpu(cnt->rx_bytes) >> 2));
ASSIGN_32BIT_COUNTER(pma_cnt->port_xmit_packets,
be64_to_cpu(cnt->tx_frames));
ASSIGN_32BIT_COUNTER(pma_cnt->port_rcv_packets,
be64_to_cpu(cnt->rx_frames));
break;
}
case IB_PMA_PORT_COUNTERS_EXT:
{
struct ib_pma_portcounters_ext *pma_cnt_ext =
(struct ib_pma_portcounters_ext *)counters;
pma_cnt_ext->port_xmit_data =
cpu_to_be64(be64_to_cpu(cnt->tx_bytes) >> 2);
pma_cnt_ext->port_rcv_data =
cpu_to_be64(be64_to_cpu(cnt->rx_bytes) >> 2);
pma_cnt_ext->port_xmit_packets = cnt->tx_frames;
pma_cnt_ext->port_rcv_packets = cnt->rx_frames;
break;
}
}
}
static int iboe_process_mad_port_info(void *out_mad)
{
struct ib_class_port_info cpi = {};
cpi.capability_mask = IB_PMA_CLASS_CAP_EXT_WIDTH;
memcpy(out_mad, &cpi, sizeof(cpi));
return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
}
static int iboe_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
const struct ib_wc *in_wc, const struct ib_grh *in_grh,
const struct ib_mad *in_mad, struct ib_mad *out_mad)
{
struct mlx4_counter counter_stats;
struct mlx4_ib_dev *dev = to_mdev(ibdev);
struct counter_index *tmp_counter;
int err = IB_MAD_RESULT_FAILURE, stats_avail = 0;
if (in_mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_PERF_MGMT)
return -EINVAL;
if (in_mad->mad_hdr.attr_id == IB_PMA_CLASS_PORT_INFO)
return iboe_process_mad_port_info((void *)(out_mad->data + 40));
memset(&counter_stats, 0, sizeof(counter_stats));
mutex_lock(&dev->counters_table[port_num - 1].mutex);
list_for_each_entry(tmp_counter,
&dev->counters_table[port_num - 1].counters_list,
list) {
err = mlx4_get_counter_stats(dev->dev,
tmp_counter->index,
&counter_stats, 0);
if (err) {
err = IB_MAD_RESULT_FAILURE;
stats_avail = 0;
break;
}
stats_avail = 1;
}
mutex_unlock(&dev->counters_table[port_num - 1].mutex);
if (stats_avail) {
memset(out_mad->data, 0, sizeof out_mad->data);
switch (counter_stats.counter_mode & 0xf) {
case 0:
edit_counter(&counter_stats,
(void *)(out_mad->data + 40),
in_mad->mad_hdr.attr_id);
err = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
break;
default:
err = IB_MAD_RESULT_FAILURE;
}
}
return err;
}
int mlx4_ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
const struct ib_wc *in_wc, const struct ib_grh *in_grh,
const struct ib_mad_hdr *in, size_t in_mad_size,
struct ib_mad_hdr *out, size_t *out_mad_size,
u16 *out_mad_pkey_index)
{
struct mlx4_ib_dev *dev = to_mdev(ibdev);
const struct ib_mad *in_mad = (const struct ib_mad *)in;
struct ib_mad *out_mad = (struct ib_mad *)out;
enum rdma_link_layer link = rdma_port_get_link_layer(ibdev, port_num);
if (WARN_ON_ONCE(in_mad_size != sizeof(*in_mad) ||
*out_mad_size != sizeof(*out_mad)))
return IB_MAD_RESULT_FAILURE;
/* iboe_process_mad() which uses the HCA flow-counters to implement IB PMA
* queries, should be called only by VFs and for that specific purpose
*/
if (link == IB_LINK_LAYER_INFINIBAND) {
if (mlx4_is_slave(dev->dev) &&
(in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT &&
(in_mad->mad_hdr.attr_id == IB_PMA_PORT_COUNTERS ||
in_mad->mad_hdr.attr_id == IB_PMA_PORT_COUNTERS_EXT ||
in_mad->mad_hdr.attr_id == IB_PMA_CLASS_PORT_INFO)))
return iboe_process_mad(ibdev, mad_flags, port_num, in_wc,
in_grh, in_mad, out_mad);
return ib_process_mad(ibdev, mad_flags, port_num, in_wc,
in_grh, in_mad, out_mad);
}
if (link == IB_LINK_LAYER_ETHERNET)
return iboe_process_mad(ibdev, mad_flags, port_num, in_wc,
in_grh, in_mad, out_mad);
return -EINVAL;
}
static void send_handler(struct ib_mad_agent *agent,
struct ib_mad_send_wc *mad_send_wc)
{
if (mad_send_wc->send_buf->context[0])
rdma_destroy_ah(mad_send_wc->send_buf->context[0], 0);
ib_free_send_mad(mad_send_wc->send_buf);
}
int mlx4_ib_mad_init(struct mlx4_ib_dev *dev)
{
struct ib_mad_agent *agent;
int p, q;
int ret;
enum rdma_link_layer ll;
for (p = 0; p < dev->num_ports; ++p) {
ll = rdma_port_get_link_layer(&dev->ib_dev, p + 1);
for (q = 0; q <= 1; ++q) {
if (ll == IB_LINK_LAYER_INFINIBAND) {
agent = ib_register_mad_agent(&dev->ib_dev, p + 1,
q ? IB_QPT_GSI : IB_QPT_SMI,
NULL, 0, send_handler,
NULL, NULL, 0);
if (IS_ERR(agent)) {
ret = PTR_ERR(agent);
goto err;
}
dev->send_agent[p][q] = agent;
} else
dev->send_agent[p][q] = NULL;
}
}
return 0;
err:
for (p = 0; p < dev->num_ports; ++p)
for (q = 0; q <= 1; ++q)
if (dev->send_agent[p][q])
ib_unregister_mad_agent(dev->send_agent[p][q]);
return ret;
}
void mlx4_ib_mad_cleanup(struct mlx4_ib_dev *dev)
{
struct ib_mad_agent *agent;
int p, q;
for (p = 0; p < dev->num_ports; ++p) {
for (q = 0; q <= 1; ++q) {
agent = dev->send_agent[p][q];
if (agent) {
dev->send_agent[p][q] = NULL;
ib_unregister_mad_agent(agent);
}
}
if (dev->sm_ah[p])
rdma_destroy_ah(dev->sm_ah[p], 0);
}
}
static void handle_lid_change_event(struct mlx4_ib_dev *dev, u8 port_num)
{
mlx4_ib_dispatch_event(dev, port_num, IB_EVENT_LID_CHANGE);
if (mlx4_is_master(dev->dev) && !dev->sriov.is_going_down)
mlx4_gen_slaves_port_mgt_ev(dev->dev, port_num,
MLX4_EQ_PORT_INFO_LID_CHANGE_MASK);
}
static void handle_client_rereg_event(struct mlx4_ib_dev *dev, u8 port_num)
{
/* re-configure the alias-guid and mcg's */
if (mlx4_is_master(dev->dev)) {
mlx4_ib_invalidate_all_guid_record(dev, port_num);
if (!dev->sriov.is_going_down) {
mlx4_ib_mcg_port_cleanup(&dev->sriov.demux[port_num - 1], 0);
mlx4_gen_slaves_port_mgt_ev(dev->dev, port_num,
MLX4_EQ_PORT_INFO_CLIENT_REREG_MASK);
}
}
/* Update the sl to vl table from inside client rereg
* only if in secure-host mode (snooping is not possible)
* and the sl-to-vl change event is not generated by FW.
*/
if (!mlx4_is_slave(dev->dev) &&
dev->dev->flags & MLX4_FLAG_SECURE_HOST &&
!(dev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_SL_TO_VL_CHANGE_EVENT)) {
if (mlx4_is_master(dev->dev))
/* already in work queue from mlx4_ib_event queueing
* mlx4_handle_port_mgmt_change_event, which calls
* this procedure. Therefore, call sl2vl_update directly.
*/
mlx4_ib_sl2vl_update(dev, port_num);
else
mlx4_sched_ib_sl2vl_update_work(dev, port_num);
}
mlx4_ib_dispatch_event(dev, port_num, IB_EVENT_CLIENT_REREGISTER);
}
static void propagate_pkey_ev(struct mlx4_ib_dev *dev, int port_num,
struct mlx4_eqe *eqe)
{
__propagate_pkey_ev(dev, port_num, GET_BLK_PTR_FROM_EQE(eqe),
GET_MASK_FROM_EQE(eqe));
}
static void handle_slaves_guid_change(struct mlx4_ib_dev *dev, u8 port_num,
u32 guid_tbl_blk_num, u32 change_bitmap)
{
struct ib_smp *in_mad = NULL;
struct ib_smp *out_mad = NULL;
u16 i;
if (!mlx4_is_mfunc(dev->dev) || !mlx4_is_master(dev->dev))
return;
in_mad = kmalloc(sizeof *in_mad, GFP_KERNEL);
out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
if (!in_mad || !out_mad)
goto out;
guid_tbl_blk_num *= 4;
for (i = 0; i < 4; i++) {
if (change_bitmap && (!((change_bitmap >> (8 * i)) & 0xff)))
continue;
memset(in_mad, 0, sizeof *in_mad);
memset(out_mad, 0, sizeof *out_mad);
in_mad->base_version = 1;
in_mad->mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED;
in_mad->class_version = 1;
in_mad->method = IB_MGMT_METHOD_GET;
in_mad->attr_id = IB_SMP_ATTR_GUID_INFO;
in_mad->attr_mod = cpu_to_be32(guid_tbl_blk_num + i);
if (mlx4_MAD_IFC(dev,
MLX4_MAD_IFC_IGNORE_KEYS | MLX4_MAD_IFC_NET_VIEW,
port_num, NULL, NULL, in_mad, out_mad)) {
mlx4_ib_warn(&dev->ib_dev, "Failed in get GUID INFO MAD_IFC\n");
goto out;
}
mlx4_ib_update_cache_on_guid_change(dev, guid_tbl_blk_num + i,
port_num,
(u8 *)(&((struct ib_smp *)out_mad)->data));
mlx4_ib_notify_slaves_on_guid_change(dev, guid_tbl_blk_num + i,
port_num,
(u8 *)(&((struct ib_smp *)out_mad)->data));
}
out:
kfree(in_mad);
kfree(out_mad);
return;
}
void handle_port_mgmt_change_event(struct work_struct *work)
{
struct ib_event_work *ew = container_of(work, struct ib_event_work, work);
struct mlx4_ib_dev *dev = ew->ib_dev;
struct mlx4_eqe *eqe = &(ew->ib_eqe);
u8 port = eqe->event.port_mgmt_change.port;
u32 changed_attr;
u32 tbl_block;
u32 change_bitmap;
switch (eqe->subtype) {
case MLX4_DEV_PMC_SUBTYPE_PORT_INFO:
changed_attr = be32_to_cpu(eqe->event.port_mgmt_change.params.port_info.changed_attr);
/* Update the SM ah - This should be done before handling
the other changed attributes so that MADs can be sent to the SM */
if (changed_attr & MSTR_SM_CHANGE_MASK) {
u16 lid = be16_to_cpu(eqe->event.port_mgmt_change.params.port_info.mstr_sm_lid);
u8 sl = eqe->event.port_mgmt_change.params.port_info.mstr_sm_sl & 0xf;
update_sm_ah(dev, port, lid, sl);
}
/* Check if it is a lid change event */
if (changed_attr & MLX4_EQ_PORT_INFO_LID_CHANGE_MASK)
handle_lid_change_event(dev, port);
/* Generate GUID changed event */
if (changed_attr & MLX4_EQ_PORT_INFO_GID_PFX_CHANGE_MASK) {
if (mlx4_is_master(dev->dev)) {
union ib_gid gid;
int err = 0;
if (!eqe->event.port_mgmt_change.params.port_info.gid_prefix)
err = __mlx4_ib_query_gid(&dev->ib_dev, port, 0, &gid, 1);
else
gid.global.subnet_prefix =
eqe->event.port_mgmt_change.params.port_info.gid_prefix;
if (err) {
pr_warn("Could not change QP1 subnet prefix for port %d: query_gid error (%d)\n",
port, err);
} else {
pr_debug("Changing QP1 subnet prefix for port %d. old=0x%llx. new=0x%llx\n",
port,
(u64)atomic64_read(&dev->sriov.demux[port - 1].subnet_prefix),
be64_to_cpu(gid.global.subnet_prefix));
atomic64_set(&dev->sriov.demux[port - 1].subnet_prefix,
be64_to_cpu(gid.global.subnet_prefix));
}
}
mlx4_ib_dispatch_event(dev, port, IB_EVENT_GID_CHANGE);
/*if master, notify all slaves*/
if (mlx4_is_master(dev->dev))
mlx4_gen_slaves_port_mgt_ev(dev->dev, port,
MLX4_EQ_PORT_INFO_GID_PFX_CHANGE_MASK);
}
if (changed_attr & MLX4_EQ_PORT_INFO_CLIENT_REREG_MASK)
handle_client_rereg_event(dev, port);
break;
case MLX4_DEV_PMC_SUBTYPE_PKEY_TABLE:
mlx4_ib_dispatch_event(dev, port, IB_EVENT_PKEY_CHANGE);
if (mlx4_is_master(dev->dev) && !dev->sriov.is_going_down)
propagate_pkey_ev(dev, port, eqe);
break;
case MLX4_DEV_PMC_SUBTYPE_GUID_INFO:
/* paravirtualized master's guid is guid 0 -- does not change */
if (!mlx4_is_master(dev->dev))
mlx4_ib_dispatch_event(dev, port, IB_EVENT_GID_CHANGE);
/*if master, notify relevant slaves*/
else if (!dev->sriov.is_going_down) {
tbl_block = GET_BLK_PTR_FROM_EQE(eqe);
change_bitmap = GET_MASK_FROM_EQE(eqe);
handle_slaves_guid_change(dev, port, tbl_block, change_bitmap);
}
break;
case MLX4_DEV_PMC_SUBTYPE_SL_TO_VL_MAP:
/* cache sl to vl mapping changes for use in
* filling QP1 LRH VL field when sending packets
*/
if (!mlx4_is_slave(dev->dev)) {
union sl2vl_tbl_to_u64 sl2vl64;
int jj;
for (jj = 0; jj < 8; jj++) {
sl2vl64.sl8[jj] =
eqe->event.port_mgmt_change.params.sl2vl_tbl_change_info.sl2vl_table[jj];
pr_debug("port %u, sl2vl[%d] = %02x\n",
port, jj, sl2vl64.sl8[jj]);
}
atomic64_set(&dev->sl2vl[port - 1], sl2vl64.sl64);
}
break;
default:
pr_warn("Unsupported subtype 0x%x for "
"Port Management Change event\n", eqe->subtype);
}
kfree(ew);
}
void mlx4_ib_dispatch_event(struct mlx4_ib_dev *dev, u8 port_num,
enum ib_event_type type)
{
struct ib_event event;
event.device = &dev->ib_dev;
event.element.port_num = port_num;
event.event = type;
ib_dispatch_event(&event);
}
static void mlx4_ib_tunnel_comp_handler(struct ib_cq *cq, void *arg)
{
unsigned long flags;
struct mlx4_ib_demux_pv_ctx *ctx = cq->cq_context;
struct mlx4_ib_dev *dev = to_mdev(ctx->ib_dev);
spin_lock_irqsave(&dev->sriov.going_down_lock, flags);
if (!dev->sriov.is_going_down && ctx->state == DEMUX_PV_STATE_ACTIVE)
queue_work(ctx->wq, &ctx->work);
spin_unlock_irqrestore(&dev->sriov.going_down_lock, flags);
}
static int mlx4_ib_post_pv_qp_buf(struct mlx4_ib_demux_pv_ctx *ctx,
struct mlx4_ib_demux_pv_qp *tun_qp,
int index)
{
struct ib_sge sg_list;
struct ib_recv_wr recv_wr;
const struct ib_recv_wr *bad_recv_wr;
int size;
size = (tun_qp->qp->qp_type == IB_QPT_UD) ?
sizeof (struct mlx4_tunnel_mad) : sizeof (struct mlx4_mad_rcv_buf);
sg_list.addr = tun_qp->ring[index].map;
sg_list.length = size;
sg_list.lkey = ctx->pd->local_dma_lkey;
recv_wr.next = NULL;
recv_wr.sg_list = &sg_list;
recv_wr.num_sge = 1;
recv_wr.wr_id = (u64) index | MLX4_TUN_WRID_RECV |
MLX4_TUN_SET_WRID_QPN(tun_qp->proxy_qpt);
ib_dma_sync_single_for_device(ctx->ib_dev, tun_qp->ring[index].map,
size, DMA_FROM_DEVICE);
return ib_post_recv(tun_qp->qp, &recv_wr, &bad_recv_wr);
}
static int mlx4_ib_multiplex_sa_handler(struct ib_device *ibdev, int port,
int slave, struct ib_sa_mad *sa_mad)
{
int ret = 0;
/* dispatch to different sa handlers */
switch (be16_to_cpu(sa_mad->mad_hdr.attr_id)) {
case IB_SA_ATTR_MC_MEMBER_REC:
ret = mlx4_ib_mcg_multiplex_handler(ibdev, port, slave, sa_mad);
break;
default:
break;
}
return ret;
}
static int is_proxy_qp0(struct mlx4_ib_dev *dev, int qpn, int slave)
{
int proxy_start = dev->dev->phys_caps.base_proxy_sqpn + 8 * slave;
return (qpn >= proxy_start && qpn <= proxy_start + 1);
}
int mlx4_ib_send_to_wire(struct mlx4_ib_dev *dev, int slave, u8 port,
enum ib_qp_type dest_qpt, u16 pkey_index,
u32 remote_qpn, u32 qkey, struct rdma_ah_attr *attr,
u8 *s_mac, u16 vlan_id, struct ib_mad *mad)
{
struct ib_sge list;
struct ib_ud_wr wr;
const struct ib_send_wr *bad_wr;
struct mlx4_ib_demux_pv_ctx *sqp_ctx;
struct mlx4_ib_demux_pv_qp *sqp;
struct mlx4_mad_snd_buf *sqp_mad;
struct ib_ah *ah;
struct ib_qp *send_qp = NULL;
unsigned wire_tx_ix = 0;
int ret = 0;
u16 wire_pkey_ix;
int src_qpnum;
sqp_ctx = dev->sriov.sqps[port-1];
/* check if proxy qp created */
if (!sqp_ctx || sqp_ctx->state != DEMUX_PV_STATE_ACTIVE)
return -EAGAIN;
if (dest_qpt == IB_QPT_SMI) {
src_qpnum = 0;
sqp = &sqp_ctx->qp[0];
wire_pkey_ix = dev->pkeys.virt2phys_pkey[slave][port - 1][0];
} else {
src_qpnum = 1;
sqp = &sqp_ctx->qp[1];
wire_pkey_ix = dev->pkeys.virt2phys_pkey[slave][port - 1][pkey_index];
}
send_qp = sqp->qp;
/* create ah */
ah = mlx4_ib_create_ah_slave(sqp_ctx->pd, attr,
rdma_ah_retrieve_grh(attr)->sgid_index,
s_mac, vlan_id);
if (IS_ERR(ah))
return -ENOMEM;
spin_lock(&sqp->tx_lock);
if (sqp->tx_ix_head - sqp->tx_ix_tail >=
(MLX4_NUM_TUNNEL_BUFS - 1))
ret = -EAGAIN;
else
wire_tx_ix = (++sqp->tx_ix_head) & (MLX4_NUM_TUNNEL_BUFS - 1);
spin_unlock(&sqp->tx_lock);
if (ret)
goto out;
sqp_mad = (struct mlx4_mad_snd_buf *) (sqp->tx_ring[wire_tx_ix].buf.addr);
if (sqp->tx_ring[wire_tx_ix].ah)
rdma_destroy_ah(sqp->tx_ring[wire_tx_ix].ah, 0);
sqp->tx_ring[wire_tx_ix].ah = ah;
ib_dma_sync_single_for_cpu(&dev->ib_dev,
sqp->tx_ring[wire_tx_ix].buf.map,
sizeof (struct mlx4_mad_snd_buf),
DMA_TO_DEVICE);
memcpy(&sqp_mad->payload, mad, sizeof *mad);
ib_dma_sync_single_for_device(&dev->ib_dev,
sqp->tx_ring[wire_tx_ix].buf.map,
sizeof (struct mlx4_mad_snd_buf),
DMA_TO_DEVICE);
list.addr = sqp->tx_ring[wire_tx_ix].buf.map;
list.length = sizeof (struct mlx4_mad_snd_buf);
list.lkey = sqp_ctx->pd->local_dma_lkey;
wr.ah = ah;
wr.port_num = port;
wr.pkey_index = wire_pkey_ix;
wr.remote_qkey = qkey;
wr.remote_qpn = remote_qpn;
wr.wr.next = NULL;
wr.wr.wr_id = ((u64) wire_tx_ix) | MLX4_TUN_SET_WRID_QPN(src_qpnum);
wr.wr.sg_list = &list;
wr.wr.num_sge = 1;
wr.wr.opcode = IB_WR_SEND;
wr.wr.send_flags = IB_SEND_SIGNALED;
ret = ib_post_send(send_qp, &wr.wr, &bad_wr);
if (!ret)
return 0;
spin_lock(&sqp->tx_lock);
sqp->tx_ix_tail++;
spin_unlock(&sqp->tx_lock);
sqp->tx_ring[wire_tx_ix].ah = NULL;
out:
mlx4_ib_destroy_ah(ah, 0);
return ret;
}
static int get_slave_base_gid_ix(struct mlx4_ib_dev *dev, int slave, int port)
{
if (rdma_port_get_link_layer(&dev->ib_dev, port) == IB_LINK_LAYER_INFINIBAND)
return slave;
return mlx4_get_base_gid_ix(dev->dev, slave, port);
}
static void fill_in_real_sgid_index(struct mlx4_ib_dev *dev, int slave, int port,
struct rdma_ah_attr *ah_attr)
{
struct ib_global_route *grh = rdma_ah_retrieve_grh(ah_attr);
if (rdma_port_get_link_layer(&dev->ib_dev, port) == IB_LINK_LAYER_INFINIBAND)
grh->sgid_index = slave;
else
grh->sgid_index += get_slave_base_gid_ix(dev, slave, port);
}
static void mlx4_ib_multiplex_mad(struct mlx4_ib_demux_pv_ctx *ctx, struct ib_wc *wc)
{
struct mlx4_ib_dev *dev = to_mdev(ctx->ib_dev);
struct mlx4_ib_demux_pv_qp *tun_qp = &ctx->qp[MLX4_TUN_WRID_QPN(wc->wr_id)];
int wr_ix = wc->wr_id & (MLX4_NUM_TUNNEL_BUFS - 1);
struct mlx4_tunnel_mad *tunnel = tun_qp->ring[wr_ix].addr;
struct mlx4_ib_ah ah;
struct rdma_ah_attr ah_attr;
u8 *slave_id;
int slave;
int port;
u16 vlan_id;
u8 qos;
u8 *dmac;
/* Get slave that sent this packet */
if (wc->src_qp < dev->dev->phys_caps.base_proxy_sqpn ||
wc->src_qp >= dev->dev->phys_caps.base_proxy_sqpn + 8 * MLX4_MFUNC_MAX ||
(wc->src_qp & 0x1) != ctx->port - 1 ||
wc->src_qp & 0x4) {
mlx4_ib_warn(ctx->ib_dev, "can't multiplex bad sqp:%d\n", wc->src_qp);
return;
}
slave = ((wc->src_qp & ~0x7) - dev->dev->phys_caps.base_proxy_sqpn) / 8;
if (slave != ctx->slave) {
mlx4_ib_warn(ctx->ib_dev, "can't multiplex bad sqp:%d: "
"belongs to another slave\n", wc->src_qp);
return;
}
/* Map transaction ID */
ib_dma_sync_single_for_cpu(ctx->ib_dev, tun_qp->ring[wr_ix].map,
sizeof (struct mlx4_tunnel_mad),
DMA_FROM_DEVICE);
switch (tunnel->mad.mad_hdr.method) {
case IB_MGMT_METHOD_SET:
case IB_MGMT_METHOD_GET:
case IB_MGMT_METHOD_REPORT:
case IB_SA_METHOD_GET_TABLE:
case IB_SA_METHOD_DELETE:
case IB_SA_METHOD_GET_MULTI:
case IB_SA_METHOD_GET_TRACE_TBL:
slave_id = (u8 *) &tunnel->mad.mad_hdr.tid;
if (*slave_id) {
mlx4_ib_warn(ctx->ib_dev, "egress mad has non-null tid msb:%d "
"class:%d slave:%d\n", *slave_id,
tunnel->mad.mad_hdr.mgmt_class, slave);
return;
} else
*slave_id = slave;
default:
/* nothing */;
}
/* Class-specific handling */
switch (tunnel->mad.mad_hdr.mgmt_class) {
case IB_MGMT_CLASS_SUBN_LID_ROUTED:
case IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE:
if (slave != mlx4_master_func_num(dev->dev) &&
!mlx4_vf_smi_enabled(dev->dev, slave, ctx->port))
return;
break;
case IB_MGMT_CLASS_SUBN_ADM:
if (mlx4_ib_multiplex_sa_handler(ctx->ib_dev, ctx->port, slave,
(struct ib_sa_mad *) &tunnel->mad))
return;
break;
case IB_MGMT_CLASS_CM:
if (mlx4_ib_multiplex_cm_handler(ctx->ib_dev, ctx->port, slave,
(struct ib_mad *) &tunnel->mad))
return;
break;
case IB_MGMT_CLASS_DEVICE_MGMT:
if (tunnel->mad.mad_hdr.method != IB_MGMT_METHOD_GET &&
tunnel->mad.mad_hdr.method != IB_MGMT_METHOD_SET)
return;
break;
default:
/* Drop unsupported classes for slaves in tunnel mode */
if (slave != mlx4_master_func_num(dev->dev)) {
mlx4_ib_warn(ctx->ib_dev, "dropping unsupported egress mad from class:%d "
"for slave:%d\n", tunnel->mad.mad_hdr.mgmt_class, slave);
return;
}
}
/* We are using standard ib_core services to send the mad, so generate a
* stadard address handle by decoding the tunnelled mlx4_ah fields */
memcpy(&ah.av, &tunnel->hdr.av, sizeof (struct mlx4_av));
ah.ibah.device = ctx->ib_dev;
port = be32_to_cpu(ah.av.ib.port_pd) >> 24;
port = mlx4_slave_convert_port(dev->dev, slave, port);
if (port < 0)
return;
ah.av.ib.port_pd = cpu_to_be32(port << 24 | (be32_to_cpu(ah.av.ib.port_pd) & 0xffffff));
ah.ibah.type = rdma_ah_find_type(&dev->ib_dev, port);
mlx4_ib_query_ah(&ah.ibah, &ah_attr);
if (rdma_ah_get_ah_flags(&ah_attr) & IB_AH_GRH)
fill_in_real_sgid_index(dev, slave, ctx->port, &ah_attr);
dmac = rdma_ah_retrieve_dmac(&ah_attr);
if (dmac)
memcpy(dmac, tunnel->hdr.mac, ETH_ALEN);
vlan_id = be16_to_cpu(tunnel->hdr.vlan);
/* if slave have default vlan use it */
if (mlx4_get_slave_default_vlan(dev->dev, ctx->port, slave,
&vlan_id, &qos))
rdma_ah_set_sl(&ah_attr, qos);
mlx4_ib_send_to_wire(dev, slave, ctx->port,
is_proxy_qp0(dev, wc->src_qp, slave) ?
IB_QPT_SMI : IB_QPT_GSI,
be16_to_cpu(tunnel->hdr.pkey_index),
be32_to_cpu(tunnel->hdr.remote_qpn),
be32_to_cpu(tunnel->hdr.qkey),
&ah_attr, wc->smac, vlan_id, &tunnel->mad);
}
static int mlx4_ib_alloc_pv_bufs(struct mlx4_ib_demux_pv_ctx *ctx,
enum ib_qp_type qp_type, int is_tun)
{
int i;
struct mlx4_ib_demux_pv_qp *tun_qp;
int rx_buf_size, tx_buf_size;
if (qp_type > IB_QPT_GSI)
return -EINVAL;
tun_qp = &ctx->qp[qp_type];
tun_qp->ring = kcalloc(MLX4_NUM_TUNNEL_BUFS,
sizeof(struct mlx4_ib_buf),
GFP_KERNEL);
if (!tun_qp->ring)
return -ENOMEM;
tun_qp->tx_ring = kcalloc(MLX4_NUM_TUNNEL_BUFS,
sizeof (struct mlx4_ib_tun_tx_buf),
GFP_KERNEL);
if (!tun_qp->tx_ring) {
kfree(tun_qp->ring);
tun_qp->ring = NULL;
return -ENOMEM;
}
if (is_tun) {
rx_buf_size = sizeof (struct mlx4_tunnel_mad);
tx_buf_size = sizeof (struct mlx4_rcv_tunnel_mad);
} else {
rx_buf_size = sizeof (struct mlx4_mad_rcv_buf);
tx_buf_size = sizeof (struct mlx4_mad_snd_buf);
}
for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) {
tun_qp->ring[i].addr = kmalloc(rx_buf_size, GFP_KERNEL);
if (!tun_qp->ring[i].addr)
goto err;
tun_qp->ring[i].map = ib_dma_map_single(ctx->ib_dev,
tun_qp->ring[i].addr,
rx_buf_size,
DMA_FROM_DEVICE);
if (ib_dma_mapping_error(ctx->ib_dev, tun_qp->ring[i].map)) {
kfree(tun_qp->ring[i].addr);
goto err;
}
}
for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) {
tun_qp->tx_ring[i].buf.addr =
kmalloc(tx_buf_size, GFP_KERNEL);
if (!tun_qp->tx_ring[i].buf.addr)
goto tx_err;
tun_qp->tx_ring[i].buf.map =
ib_dma_map_single(ctx->ib_dev,
tun_qp->tx_ring[i].buf.addr,
tx_buf_size,
DMA_TO_DEVICE);
if (ib_dma_mapping_error(ctx->ib_dev,
tun_qp->tx_ring[i].buf.map)) {
kfree(tun_qp->tx_ring[i].buf.addr);
goto tx_err;
}
tun_qp->tx_ring[i].ah = NULL;
}
spin_lock_init(&tun_qp->tx_lock);
tun_qp->tx_ix_head = 0;
tun_qp->tx_ix_tail = 0;
tun_qp->proxy_qpt = qp_type;
return 0;
tx_err:
while (i > 0) {
--i;
ib_dma_unmap_single(ctx->ib_dev, tun_qp->tx_ring[i].buf.map,
tx_buf_size, DMA_TO_DEVICE);
kfree(tun_qp->tx_ring[i].buf.addr);
}
kfree(tun_qp->tx_ring);
tun_qp->tx_ring = NULL;
i = MLX4_NUM_TUNNEL_BUFS;
err:
while (i > 0) {
--i;
ib_dma_unmap_single(ctx->ib_dev, tun_qp->ring[i].map,
rx_buf_size, DMA_FROM_DEVICE);
kfree(tun_qp->ring[i].addr);
}
kfree(tun_qp->ring);
tun_qp->ring = NULL;
return -ENOMEM;
}
static void mlx4_ib_free_pv_qp_bufs(struct mlx4_ib_demux_pv_ctx *ctx,
enum ib_qp_type qp_type, int is_tun)
{
int i;
struct mlx4_ib_demux_pv_qp *tun_qp;
int rx_buf_size, tx_buf_size;
if (qp_type > IB_QPT_GSI)
return;
tun_qp = &ctx->qp[qp_type];
if (is_tun) {
rx_buf_size = sizeof (struct mlx4_tunnel_mad);
tx_buf_size = sizeof (struct mlx4_rcv_tunnel_mad);
} else {
rx_buf_size = sizeof (struct mlx4_mad_rcv_buf);
tx_buf_size = sizeof (struct mlx4_mad_snd_buf);
}
for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) {
ib_dma_unmap_single(ctx->ib_dev, tun_qp->ring[i].map,
rx_buf_size, DMA_FROM_DEVICE);
kfree(tun_qp->ring[i].addr);
}
for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) {
ib_dma_unmap_single(ctx->ib_dev, tun_qp->tx_ring[i].buf.map,
tx_buf_size, DMA_TO_DEVICE);
kfree(tun_qp->tx_ring[i].buf.addr);
if (tun_qp->tx_ring[i].ah)
rdma_destroy_ah(tun_qp->tx_ring[i].ah, 0);
}
kfree(tun_qp->tx_ring);
kfree(tun_qp->ring);
}
static void mlx4_ib_tunnel_comp_worker(struct work_struct *work)
{
struct mlx4_ib_demux_pv_ctx *ctx;
struct mlx4_ib_demux_pv_qp *tun_qp;
struct ib_wc wc;
int ret;
ctx = container_of(work, struct mlx4_ib_demux_pv_ctx, work);
ib_req_notify_cq(ctx->cq, IB_CQ_NEXT_COMP);
while (ib_poll_cq(ctx->cq, 1, &wc) == 1) {
tun_qp = &ctx->qp[MLX4_TUN_WRID_QPN(wc.wr_id)];
if (wc.status == IB_WC_SUCCESS) {
switch (wc.opcode) {
case IB_WC_RECV:
mlx4_ib_multiplex_mad(ctx, &wc);
ret = mlx4_ib_post_pv_qp_buf(ctx, tun_qp,
wc.wr_id &
(MLX4_NUM_TUNNEL_BUFS - 1));
if (ret)
pr_err("Failed reposting tunnel "
"buf:%lld\n", wc.wr_id);
break;
case IB_WC_SEND:
pr_debug("received tunnel send completion:"
"wrid=0x%llx, status=0x%x\n",
wc.wr_id, wc.status);
rdma_destroy_ah(tun_qp->tx_ring[wc.wr_id &
(MLX4_NUM_TUNNEL_BUFS - 1)].ah, 0);
tun_qp->tx_ring[wc.wr_id & (MLX4_NUM_TUNNEL_BUFS - 1)].ah
= NULL;
spin_lock(&tun_qp->tx_lock);
tun_qp->tx_ix_tail++;
spin_unlock(&tun_qp->tx_lock);
break;
default:
break;
}
} else {
pr_debug("mlx4_ib: completion error in tunnel: %d."
" status = %d, wrid = 0x%llx\n",
ctx->slave, wc.status, wc.wr_id);
if (!MLX4_TUN_IS_RECV(wc.wr_id)) {
rdma_destroy_ah(tun_qp->tx_ring[wc.wr_id &
(MLX4_NUM_TUNNEL_BUFS - 1)].ah, 0);
tun_qp->tx_ring[wc.wr_id & (MLX4_NUM_TUNNEL_BUFS - 1)].ah
= NULL;
spin_lock(&tun_qp->tx_lock);
tun_qp->tx_ix_tail++;
spin_unlock(&tun_qp->tx_lock);
}
}
}
}
static void pv_qp_event_handler(struct ib_event *event, void *qp_context)
{
struct mlx4_ib_demux_pv_ctx *sqp = qp_context;
/* It's worse than that! He's dead, Jim! */
pr_err("Fatal error (%d) on a MAD QP on port %d\n",
event->event, sqp->port);
}
static int create_pv_sqp(struct mlx4_ib_demux_pv_ctx *ctx,
enum ib_qp_type qp_type, int create_tun)
{
int i, ret;
struct mlx4_ib_demux_pv_qp *tun_qp;
struct mlx4_ib_qp_tunnel_init_attr qp_init_attr;
struct ib_qp_attr attr;
int qp_attr_mask_INIT;
if (qp_type > IB_QPT_GSI)
return -EINVAL;
tun_qp = &ctx->qp[qp_type];
memset(&qp_init_attr, 0, sizeof qp_init_attr);
qp_init_attr.init_attr.send_cq = ctx->cq;
qp_init_attr.init_attr.recv_cq = ctx->cq;
qp_init_attr.init_attr.sq_sig_type = IB_SIGNAL_ALL_WR;
qp_init_attr.init_attr.cap.max_send_wr = MLX4_NUM_TUNNEL_BUFS;
qp_init_attr.init_attr.cap.max_recv_wr = MLX4_NUM_TUNNEL_BUFS;
qp_init_attr.init_attr.cap.max_send_sge = 1;
qp_init_attr.init_attr.cap.max_recv_sge = 1;
if (create_tun) {
qp_init_attr.init_attr.qp_type = IB_QPT_UD;
qp_init_attr.init_attr.create_flags = MLX4_IB_SRIOV_TUNNEL_QP;
qp_init_attr.port = ctx->port;
qp_init_attr.slave = ctx->slave;
qp_init_attr.proxy_qp_type = qp_type;
qp_attr_mask_INIT = IB_QP_STATE | IB_QP_PKEY_INDEX |
IB_QP_QKEY | IB_QP_PORT;
} else {
qp_init_attr.init_attr.qp_type = qp_type;
qp_init_attr.init_attr.create_flags = MLX4_IB_SRIOV_SQP;
qp_attr_mask_INIT = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_QKEY;
}
qp_init_attr.init_attr.port_num = ctx->port;
qp_init_attr.init_attr.qp_context = ctx;
qp_init_attr.init_attr.event_handler = pv_qp_event_handler;
tun_qp->qp = ib_create_qp(ctx->pd, &qp_init_attr.init_attr);
if (IS_ERR(tun_qp->qp)) {
ret = PTR_ERR(tun_qp->qp);
tun_qp->qp = NULL;
pr_err("Couldn't create %s QP (%d)\n",
create_tun ? "tunnel" : "special", ret);
return ret;
}
memset(&attr, 0, sizeof attr);
attr.qp_state = IB_QPS_INIT;
ret = 0;
if (create_tun)
ret = find_slave_port_pkey_ix(to_mdev(ctx->ib_dev), ctx->slave,
ctx->port, IB_DEFAULT_PKEY_FULL,
&attr.pkey_index);
if (ret || !create_tun)
attr.pkey_index =
to_mdev(ctx->ib_dev)->pkeys.virt2phys_pkey[ctx->slave][ctx->port - 1][0];
attr.qkey = IB_QP1_QKEY;
attr.port_num = ctx->port;
ret = ib_modify_qp(tun_qp->qp, &attr, qp_attr_mask_INIT);
if (ret) {
pr_err("Couldn't change %s qp state to INIT (%d)\n",
create_tun ? "tunnel" : "special", ret);
goto err_qp;
}
attr.qp_state = IB_QPS_RTR;
ret = ib_modify_qp(tun_qp->qp, &attr, IB_QP_STATE);
if (ret) {
pr_err("Couldn't change %s qp state to RTR (%d)\n",
create_tun ? "tunnel" : "special", ret);
goto err_qp;
}
attr.qp_state = IB_QPS_RTS;
attr.sq_psn = 0;
ret = ib_modify_qp(tun_qp->qp, &attr, IB_QP_STATE | IB_QP_SQ_PSN);
if (ret) {
pr_err("Couldn't change %s qp state to RTS (%d)\n",
create_tun ? "tunnel" : "special", ret);
goto err_qp;
}
for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) {
ret = mlx4_ib_post_pv_qp_buf(ctx, tun_qp, i);
if (ret) {
pr_err(" mlx4_ib_post_pv_buf error"
" (err = %d, i = %d)\n", ret, i);
goto err_qp;
}
}
return 0;
err_qp:
ib_destroy_qp(tun_qp->qp);
tun_qp->qp = NULL;
return ret;
}
/*
* IB MAD completion callback for real SQPs
*/
static void mlx4_ib_sqp_comp_worker(struct work_struct *work)
{
struct mlx4_ib_demux_pv_ctx *ctx;
struct mlx4_ib_demux_pv_qp *sqp;
struct ib_wc wc;
struct ib_grh *grh;
struct ib_mad *mad;
ctx = container_of(work, struct mlx4_ib_demux_pv_ctx, work);
ib_req_notify_cq(ctx->cq, IB_CQ_NEXT_COMP);
while (mlx4_ib_poll_cq(ctx->cq, 1, &wc) == 1) {
sqp = &ctx->qp[MLX4_TUN_WRID_QPN(wc.wr_id)];
if (wc.status == IB_WC_SUCCESS) {
switch (wc.opcode) {
case IB_WC_SEND:
rdma_destroy_ah(sqp->tx_ring[wc.wr_id &
(MLX4_NUM_TUNNEL_BUFS - 1)].ah, 0);
sqp->tx_ring[wc.wr_id & (MLX4_NUM_TUNNEL_BUFS - 1)].ah
= NULL;
spin_lock(&sqp->tx_lock);
sqp->tx_ix_tail++;
spin_unlock(&sqp->tx_lock);
break;
case IB_WC_RECV:
mad = (struct ib_mad *) &(((struct mlx4_mad_rcv_buf *)
(sqp->ring[wc.wr_id &
(MLX4_NUM_TUNNEL_BUFS - 1)].addr))->payload);
grh = &(((struct mlx4_mad_rcv_buf *)
(sqp->ring[wc.wr_id &
(MLX4_NUM_TUNNEL_BUFS - 1)].addr))->grh);
mlx4_ib_demux_mad(ctx->ib_dev, ctx->port, &wc, grh, mad);
if (mlx4_ib_post_pv_qp_buf(ctx, sqp, wc.wr_id &
(MLX4_NUM_TUNNEL_BUFS - 1)))
pr_err("Failed reposting SQP "
"buf:%lld\n", wc.wr_id);
break;
default:
break;
}
} else {
pr_debug("mlx4_ib: completion error in tunnel: %d."
" status = %d, wrid = 0x%llx\n",
ctx->slave, wc.status, wc.wr_id);
if (!MLX4_TUN_IS_RECV(wc.wr_id)) {
rdma_destroy_ah(sqp->tx_ring[wc.wr_id &
(MLX4_NUM_TUNNEL_BUFS - 1)].ah, 0);
sqp->tx_ring[wc.wr_id & (MLX4_NUM_TUNNEL_BUFS - 1)].ah
= NULL;
spin_lock(&sqp->tx_lock);
sqp->tx_ix_tail++;
spin_unlock(&sqp->tx_lock);
}
}
}
}
static int alloc_pv_object(struct mlx4_ib_dev *dev, int slave, int port,
struct mlx4_ib_demux_pv_ctx **ret_ctx)
{
struct mlx4_ib_demux_pv_ctx *ctx;
*ret_ctx = NULL;
ctx = kzalloc(sizeof (struct mlx4_ib_demux_pv_ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
ctx->ib_dev = &dev->ib_dev;
ctx->port = port;
ctx->slave = slave;
*ret_ctx = ctx;
return 0;
}
static void free_pv_object(struct mlx4_ib_dev *dev, int slave, int port)
{
if (dev->sriov.demux[port - 1].tun[slave]) {
kfree(dev->sriov.demux[port - 1].tun[slave]);
dev->sriov.demux[port - 1].tun[slave] = NULL;
}
}
static int create_pv_resources(struct ib_device *ibdev, int slave, int port,
int create_tun, struct mlx4_ib_demux_pv_ctx *ctx)
{
int ret, cq_size;
struct ib_cq_init_attr cq_attr = {};
if (ctx->state != DEMUX_PV_STATE_DOWN)
return -EEXIST;
ctx->state = DEMUX_PV_STATE_STARTING;
/* have QP0 only if link layer is IB */
if (rdma_port_get_link_layer(ibdev, ctx->port) ==
IB_LINK_LAYER_INFINIBAND)
ctx->has_smi = 1;
if (ctx->has_smi) {
ret = mlx4_ib_alloc_pv_bufs(ctx, IB_QPT_SMI, create_tun);
if (ret) {
pr_err("Failed allocating qp0 tunnel bufs (%d)\n", ret);
goto err_out;
}
}
ret = mlx4_ib_alloc_pv_bufs(ctx, IB_QPT_GSI, create_tun);
if (ret) {
pr_err("Failed allocating qp1 tunnel bufs (%d)\n", ret);
goto err_out_qp0;
}
cq_size = 2 * MLX4_NUM_TUNNEL_BUFS;
if (ctx->has_smi)
cq_size *= 2;
cq_attr.cqe = cq_size;
ctx->cq = ib_create_cq(ctx->ib_dev, mlx4_ib_tunnel_comp_handler,
NULL, ctx, &cq_attr);
if (IS_ERR(ctx->cq)) {
ret = PTR_ERR(ctx->cq);
pr_err("Couldn't create tunnel CQ (%d)\n", ret);
goto err_buf;
}
ctx->pd = ib_alloc_pd(ctx->ib_dev, 0);
if (IS_ERR(ctx->pd)) {
ret = PTR_ERR(ctx->pd);
pr_err("Couldn't create tunnel PD (%d)\n", ret);
goto err_cq;
}
if (ctx->has_smi) {
ret = create_pv_sqp(ctx, IB_QPT_SMI, create_tun);
if (ret) {
pr_err("Couldn't create %s QP0 (%d)\n",
create_tun ? "tunnel for" : "", ret);
goto err_pd;
}
}
ret = create_pv_sqp(ctx, IB_QPT_GSI, create_tun);
if (ret) {
pr_err("Couldn't create %s QP1 (%d)\n",
create_tun ? "tunnel for" : "", ret);
goto err_qp0;
}
if (create_tun)
INIT_WORK(&ctx->work, mlx4_ib_tunnel_comp_worker);
else
INIT_WORK(&ctx->work, mlx4_ib_sqp_comp_worker);
ctx->wq = to_mdev(ibdev)->sriov.demux[port - 1].wq;
ret = ib_req_notify_cq(ctx->cq, IB_CQ_NEXT_COMP);
if (ret) {
pr_err("Couldn't arm tunnel cq (%d)\n", ret);
goto err_wq;
}
ctx->state = DEMUX_PV_STATE_ACTIVE;
return 0;
err_wq:
ctx->wq = NULL;
ib_destroy_qp(ctx->qp[1].qp);
ctx->qp[1].qp = NULL;
err_qp0:
if (ctx->has_smi)
ib_destroy_qp(ctx->qp[0].qp);
ctx->qp[0].qp = NULL;
err_pd:
ib_dealloc_pd(ctx->pd);
ctx->pd = NULL;
err_cq:
ib_destroy_cq(ctx->cq);
ctx->cq = NULL;
err_buf:
mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_GSI, create_tun);
err_out_qp0:
if (ctx->has_smi)
mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_SMI, create_tun);
err_out:
ctx->state = DEMUX_PV_STATE_DOWN;
return ret;
}
static void destroy_pv_resources(struct mlx4_ib_dev *dev, int slave, int port,
struct mlx4_ib_demux_pv_ctx *ctx, int flush)
{
if (!ctx)
return;
if (ctx->state > DEMUX_PV_STATE_DOWN) {
ctx->state = DEMUX_PV_STATE_DOWNING;
if (flush)
flush_workqueue(ctx->wq);
if (ctx->has_smi) {
ib_destroy_qp(ctx->qp[0].qp);
ctx->qp[0].qp = NULL;
mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_SMI, 1);
}
ib_destroy_qp(ctx->qp[1].qp);
ctx->qp[1].qp = NULL;
mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_GSI, 1);
ib_dealloc_pd(ctx->pd);
ctx->pd = NULL;
ib_destroy_cq(ctx->cq);
ctx->cq = NULL;
ctx->state = DEMUX_PV_STATE_DOWN;
}
}
static int mlx4_ib_tunnels_update(struct mlx4_ib_dev *dev, int slave,
int port, int do_init)
{
int ret = 0;
if (!do_init) {
clean_vf_mcast(&dev->sriov.demux[port - 1], slave);
/* for master, destroy real sqp resources */
if (slave == mlx4_master_func_num(dev->dev))
destroy_pv_resources(dev, slave, port,
dev->sriov.sqps[port - 1], 1);
/* destroy the tunnel qp resources */
destroy_pv_resources(dev, slave, port,
dev->sriov.demux[port - 1].tun[slave], 1);
return 0;
}
/* create the tunnel qp resources */
ret = create_pv_resources(&dev->ib_dev, slave, port, 1,
dev->sriov.demux[port - 1].tun[slave]);
/* for master, create the real sqp resources */
if (!ret && slave == mlx4_master_func_num(dev->dev))
ret = create_pv_resources(&dev->ib_dev, slave, port, 0,
dev->sriov.sqps[port - 1]);
return ret;
}
void mlx4_ib_tunnels_update_work(struct work_struct *work)
{
struct mlx4_ib_demux_work *dmxw;
dmxw = container_of(work, struct mlx4_ib_demux_work, work);
mlx4_ib_tunnels_update(dmxw->dev, dmxw->slave, (int) dmxw->port,
dmxw->do_init);
kfree(dmxw);
return;
}
static int mlx4_ib_alloc_demux_ctx(struct mlx4_ib_dev *dev,
struct mlx4_ib_demux_ctx *ctx,
int port)
{
char name[12];
int ret = 0;
int i;
ctx->tun = kcalloc(dev->dev->caps.sqp_demux,
sizeof (struct mlx4_ib_demux_pv_ctx *), GFP_KERNEL);
if (!ctx->tun)
return -ENOMEM;
ctx->dev = dev;
ctx->port = port;
ctx->ib_dev = &dev->ib_dev;
for (i = 0;
i < min(dev->dev->caps.sqp_demux,
(u16)(dev->dev->persist->num_vfs + 1));
i++) {
struct mlx4_active_ports actv_ports =
mlx4_get_active_ports(dev->dev, i);
if (!test_bit(port - 1, actv_ports.ports))
continue;
ret = alloc_pv_object(dev, i, port, &ctx->tun[i]);
if (ret) {
ret = -ENOMEM;
goto err_mcg;
}
}
ret = mlx4_ib_mcg_port_init(ctx);
if (ret) {
pr_err("Failed initializing mcg para-virt (%d)\n", ret);
goto err_mcg;
}
snprintf(name, sizeof name, "mlx4_ibt%d", port);
ctx->wq = alloc_ordered_workqueue(name, WQ_MEM_RECLAIM);
if (!ctx->wq) {
pr_err("Failed to create tunnelling WQ for port %d\n", port);
ret = -ENOMEM;
goto err_wq;
}
snprintf(name, sizeof name, "mlx4_ibud%d", port);
ctx->ud_wq = alloc_ordered_workqueue(name, WQ_MEM_RECLAIM);
if (!ctx->ud_wq) {
pr_err("Failed to create up/down WQ for port %d\n", port);
ret = -ENOMEM;
goto err_udwq;
}
return 0;
err_udwq:
destroy_workqueue(ctx->wq);
ctx->wq = NULL;
err_wq:
mlx4_ib_mcg_port_cleanup(ctx, 1);
err_mcg:
for (i = 0; i < dev->dev->caps.sqp_demux; i++)
free_pv_object(dev, i, port);
kfree(ctx->tun);
ctx->tun = NULL;
return ret;
}
static void mlx4_ib_free_sqp_ctx(struct mlx4_ib_demux_pv_ctx *sqp_ctx)
{
if (sqp_ctx->state > DEMUX_PV_STATE_DOWN) {
sqp_ctx->state = DEMUX_PV_STATE_DOWNING;
flush_workqueue(sqp_ctx->wq);
if (sqp_ctx->has_smi) {
ib_destroy_qp(sqp_ctx->qp[0].qp);
sqp_ctx->qp[0].qp = NULL;
mlx4_ib_free_pv_qp_bufs(sqp_ctx, IB_QPT_SMI, 0);
}
ib_destroy_qp(sqp_ctx->qp[1].qp);
sqp_ctx->qp[1].qp = NULL;
mlx4_ib_free_pv_qp_bufs(sqp_ctx, IB_QPT_GSI, 0);
ib_dealloc_pd(sqp_ctx->pd);
sqp_ctx->pd = NULL;
ib_destroy_cq(sqp_ctx->cq);
sqp_ctx->cq = NULL;
sqp_ctx->state = DEMUX_PV_STATE_DOWN;
}
}
static void mlx4_ib_free_demux_ctx(struct mlx4_ib_demux_ctx *ctx)
{
int i;
if (ctx) {
struct mlx4_ib_dev *dev = to_mdev(ctx->ib_dev);
mlx4_ib_mcg_port_cleanup(ctx, 1);
for (i = 0; i < dev->dev->caps.sqp_demux; i++) {
if (!ctx->tun[i])
continue;
if (ctx->tun[i]->state > DEMUX_PV_STATE_DOWN)
ctx->tun[i]->state = DEMUX_PV_STATE_DOWNING;
}
flush_workqueue(ctx->wq);
for (i = 0; i < dev->dev->caps.sqp_demux; i++) {
destroy_pv_resources(dev, i, ctx->port, ctx->tun[i], 0);
free_pv_object(dev, i, ctx->port);
}
kfree(ctx->tun);
destroy_workqueue(ctx->ud_wq);
destroy_workqueue(ctx->wq);
}
}
static void mlx4_ib_master_tunnels(struct mlx4_ib_dev *dev, int do_init)
{
int i;
if (!mlx4_is_master(dev->dev))
return;
/* initialize or tear down tunnel QPs for the master */
for (i = 0; i < dev->dev->caps.num_ports; i++)
mlx4_ib_tunnels_update(dev, mlx4_master_func_num(dev->dev), i + 1, do_init);
return;
}
int mlx4_ib_init_sriov(struct mlx4_ib_dev *dev)
{
int i = 0;
int err;
if (!mlx4_is_mfunc(dev->dev))
return 0;
dev->sriov.is_going_down = 0;
spin_lock_init(&dev->sriov.going_down_lock);
mlx4_ib_cm_paravirt_init(dev);
mlx4_ib_warn(&dev->ib_dev, "multi-function enabled\n");
if (mlx4_is_slave(dev->dev)) {
mlx4_ib_warn(&dev->ib_dev, "operating in qp1 tunnel mode\n");
return 0;
}
for (i = 0; i < dev->dev->caps.sqp_demux; i++) {
if (i == mlx4_master_func_num(dev->dev))
mlx4_put_slave_node_guid(dev->dev, i, dev->ib_dev.node_guid);
else
mlx4_put_slave_node_guid(dev->dev, i, mlx4_ib_gen_node_guid());
}
err = mlx4_ib_init_alias_guid_service(dev);
if (err) {
mlx4_ib_warn(&dev->ib_dev, "Failed init alias guid process.\n");
goto paravirt_err;
}
err = mlx4_ib_device_register_sysfs(dev);
if (err) {
mlx4_ib_warn(&dev->ib_dev, "Failed to register sysfs\n");
goto sysfs_err;
}
mlx4_ib_warn(&dev->ib_dev, "initializing demux service for %d qp1 clients\n",
dev->dev->caps.sqp_demux);
for (i = 0; i < dev->num_ports; i++) {
union ib_gid gid;
err = __mlx4_ib_query_gid(&dev->ib_dev, i + 1, 0, &gid, 1);
if (err)
goto demux_err;
dev->sriov.demux[i].guid_cache[0] = gid.global.interface_id;
atomic64_set(&dev->sriov.demux[i].subnet_prefix,
be64_to_cpu(gid.global.subnet_prefix));
err = alloc_pv_object(dev, mlx4_master_func_num(dev->dev), i + 1,
&dev->sriov.sqps[i]);
if (err)
goto demux_err;
err = mlx4_ib_alloc_demux_ctx(dev, &dev->sriov.demux[i], i + 1);
if (err)
goto free_pv;
}
mlx4_ib_master_tunnels(dev, 1);
return 0;
free_pv:
free_pv_object(dev, mlx4_master_func_num(dev->dev), i + 1);
demux_err:
while (--i >= 0) {
free_pv_object(dev, mlx4_master_func_num(dev->dev), i + 1);
mlx4_ib_free_demux_ctx(&dev->sriov.demux[i]);
}
mlx4_ib_device_unregister_sysfs(dev);
sysfs_err:
mlx4_ib_destroy_alias_guid_service(dev);
paravirt_err:
mlx4_ib_cm_paravirt_clean(dev, -1);
return err;
}
void mlx4_ib_close_sriov(struct mlx4_ib_dev *dev)
{
int i;
unsigned long flags;
if (!mlx4_is_mfunc(dev->dev))
return;
spin_lock_irqsave(&dev->sriov.going_down_lock, flags);
dev->sriov.is_going_down = 1;
spin_unlock_irqrestore(&dev->sriov.going_down_lock, flags);
if (mlx4_is_master(dev->dev)) {
for (i = 0; i < dev->num_ports; i++) {
flush_workqueue(dev->sriov.demux[i].ud_wq);
mlx4_ib_free_sqp_ctx(dev->sriov.sqps[i]);
kfree(dev->sriov.sqps[i]);
dev->sriov.sqps[i] = NULL;
mlx4_ib_free_demux_ctx(&dev->sriov.demux[i]);
}
mlx4_ib_cm_paravirt_clean(dev, -1);
mlx4_ib_destroy_alias_guid_service(dev);
mlx4_ib_device_unregister_sysfs(dev);
}
}
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